House



(No Model.) 2 SheetS-Eiheet 1. A. G. WATERHOUSE.

GAEBON HOLDERIEOR ARG LAMPS.

Patented Oct. 17, M382,

(No'Model.) 2 Sheets-Sheet 2. v A. G. WATE-RHOUSE. CARBON HOLDER FOR ARG LAMPS.

No. 266,236. Pa'nted O0t.17, 1882..

` Ime/241071' MMM() a A M f iUNirnn STATES *PATENT Ormea.

ADDISON G. VATERHOUSE, OF NEW YORK, N. Y., ASSIGNOR TO THE UNITED STATES ELECTRIC LIGHTING COMPANY, OF SAME PLACE.

CARBON-HOLDER FOR ARC-LAMPS.

SPECIFICATION forming part of Letters Patent No. 266,236, dated October 17, 1882.

' Application filed June 2. 1882. (No model.)

T all whom it may concern:

Be it known that I, ADDISON G. WATER- HoUsE, a citizen ofthe United States, and a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Carbon-Holders for Arc- Lamps-,.of which the following is a description, reference being had to the drawings accom panying and forming a part of the saine.

ro My invention consists primarily in a socket or holder of novel construction for-the lower or negative carbons of electric-arc lamps, and it also involves a means of insulating from the lamp-frame the said holder, or any equivalent form of holder, the nature of such improvements being more fully set forth in the following description by the aid of the accompanying drawings, in which- Figure 1 is a plan view of the lower crosszo bar of an electric-lamp frame, showing my improved socket or holder attached. Fig. 2 is a side view of the cross-bar, the central portion of the saine and the carbon-holder attached thereto being shown in section. Fig. 3-is a 2 5 central vertical section ofthe carbon-holder detached from the lamp; Fig. 4, a sectional view Y of a modified form of holder, illustrating the application of the insulating devices thereto.

The holder or socket may be used with any 3o ordinaryform ofelectric-arclamp. Thefraineof the lamp in the present case has a lower crossbar, A, which, at its middle portion,is widened or formed with a shallow cup, D, through the center of which is drilled a hole of proper diameter. Over this hole is laid a ring, C, of

hard rubber, vulcanite, or other insulating material, and upon ring C rests a box, of metal, D. A ilanged tube, E, is inserted in the box D, the length of the tube being such that it 4o extends well through the perforated cross-bar A. Tube E is screw-threaded atits lower end and 'slotted above, as shown in Fig. 3, and in the slot is inserted a loose clamping device, consisting of a metal plate, F, wider at its upper end, and having a notch,j', into which the ange e extends. In the box or seat D is cut a groove, (indicated by the character G,) the groove having approximately the form of the plate F. A washer of insulating material, K,

is applied to the under side of the cross-bar A 5o and around the projecting end of tube E.

L is a perforated block of insulating substance, vnlcanite or vulcanized ber being preferred. To its under side is clamped a ilanged tube, M, and in its upper surface is set the metal ring m, which should be slightly raised above the surface of the block.

ln using the above device a carbon is passed through the tube E, and the tube inserted in the box D. The tube M is then brought up 6o around the projecting end of the carbon, and the block L screwed to the end of tube E. By this means the tube E is drawn down through the cross-bar A, the plate F forced against the carbon by the shape of groove G, binding 6 5 tightly the carbon and holding the parts ofthe device firmly together. The current is conveyed from the carbon by an insulated wire, W, which is introduced through a groove in the insulating-ring K,and formed into or attached 7o to a ring, w, with which the metal ring m is maintained in good contact when the block L is screwed up tightly. Vire W passes up through one of the side bars ofthe frame, asindicated in Fig. 2.

To prevent contact between the carbon and the tube M, the latter is providedwith a lining of insulating material, P, paper answering well for this purpose.

The obj ects of the above-described construc- 8o tion are mainly as follows: A long carbon may be used as thenegative carbon without lengthening the lamp-frame, so that one negative carbon, by being drawn up from the tube M, will answer for several positive carbons g secondly, 8 5 no portion of the lamp-frame is included in the electric circuit, so that it will be impossible for persons handling the lamp to receive a shock or other injury from the current. This latter object is attained with other forms of socket l9o by the employment of the insulating-washers above described, as will be understood by reference to Fig'. 4, in which is illustrated a socket for a short negative carbon. In this figure the tubes E and M are replaced respectively by a socket, N, with a pivoted portion, lt, formed with a cam that tits in the grooveG, and a screw-threaded extension,.T, which en ters a recess in the block L. The washers or rings (l, K, and Imy are present in this cose, as in the former, the plan of construction und nmnipulution ot' the devices being practically the suine.

Having' now described thechuraeterand purposes ofthe devices terminfol the su bject-mutter of my present invention, what I claim as new, und desire to secure by Letters Patent, is-

1. lhe combination, with the lower crosslmr of :in electric-lmnp frame, of u box or sent, l), n tube, E, and devices t'or clamping u can bon therein, und a tube, M, for cont-lining the projecting,T end ot' n carbon, und for drawing; down the tube E und its clamping mechanism into the seut D, us set forth.

2. The combination, with the lowercross bur of un electric-lump 1raiine,ot4 a box or sent, D, provided with un incline or beveled part, Cr, u slotted tube, l1), pluto F, und tube Mfor containing the projecting' end ot' u carbon pencil, und for drawing' down the tube E into the sent D, :is described.

3. The combination, with the eross-barotnn electric lump-frame, ot e clamping,r socket or holder extending through the cross-bnr, insulating-washer C, u grooved washer, K, and n clamping-nut for the projecting;r portion ofthe socket or holder, and u wire, \V, entering the groove in washer K, these pnrts being constructed und combined in substantially the manner hereiubefore set forth.

4t. The combination, with the cross-bur of au elecirielnmp frame, of a box or sent, D, clamp ing tube or holder E, extending through the crossvbur, insuluting-washerC, groovcd washer K, block L, nut m, tube M, und wire lV, these parts being` constructed and combined in substantially the nimmer herein before set forth.

In testimony whereof" I have hereunto set my hand this 31st dny ot'Mny, 1882.

ADDISON WI'VDIGILI'IUUSIC.

Witnesses:

W. FutsBY, .PARKuR W. PAGE. 

